/* Copyright 2009
 *
 * This program and the accompanying materials
 * are made available under the terms of the
 * Eclipse Public License v1.0 which accompanies
 * this distribution, and is available at
 *
 * 		http://www.eclipse.org/legal/epl-v10.html
 *
 * Unless required by applicable law or agreed to in
 * writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES
 * OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * Contributors:
 * 	   IBM Corporation - initial API and implementation for JDT/DLTK
 *     Sean W. Quinn - initial adoption for use with PHP from various sources.
 */
package org.eclipse.php.internal.formatter.align;

/**
 * Exception used to backtrack and break available alignments When the exception
 * is thrown, it is assumed that some alignment will be changed.
 *
 * @since 2.1
 */
public class AlignmentException extends RuntimeException {

	public static final int LINE_TOO_LONG = 1;
	public static final int ALIGN_TOO_SMALL = 2;
	private static final long serialVersionUID = -3324134986466253314L; // backward compatible

	int reason;
	int value;
	public int relativeDepth;

	public AlignmentException(int reason, int relativeDepth) {
		this(reason, 0, relativeDepth);
	}

	public AlignmentException(int reason, int value, int relativeDepth) {
		this.reason = reason;
		this.value = value;
		this.relativeDepth = relativeDepth;
	}

	@Override
	public String toString() {
		StringBuffer buffer = new StringBuffer(10);
		switch (this.reason) {
		case LINE_TOO_LONG:
			buffer.append("LINE_TOO_LONG"); //$NON-NLS-1$
			break;
		case ALIGN_TOO_SMALL:
			buffer.append("ALIGN_TOO_SMALL"); //$NON-NLS-1$
			break;
		}
		buffer.append("<relativeDepth: ") //$NON-NLS-1$
				.append(this.relativeDepth).append(">\n"); //$NON-NLS-1$
		return buffer.toString();
	}
}
